Inking device



W. CLARK INKING DEVI-CE Oct. 13, 1925.

Filed Auz. 1924 Patented Oct. 13, 1925.

H I wArrERcLARx, or oimomnNGnANn, ASSIGNOR To oARIBoNUM :LIMEI'I'EQOT INKING Davida l i A p'plicatio n' filed Augus a, 1924,, s' rjiliii.rrof7es,7ss.,. j'

Be it known that I, VALTER CLARK, fa subject of the King of Great Britain, res ding "at 128 .The Avenue, Highams Park,

:5; Chingford, London,. E, 4;, England, havein vented certain new and useful Improvements in Inking Devices,of which the 011 lowing is aspecification. i I

This inventionrelates to improvements 1n Q apparatus for applying inklto the felt, or other ink-receiving layer of a pad, or ma; terial requiring to, be filled or permeated with colour. 7 V a v A common example of'such an article re- 5 quiring to beipermeatedis the felt'layerusually provided beneath the textile covering of a stamp pad and the invention will be described in reference thereto, though it I should be understood that it is also applicable toother pads or the like requiring to be :filled with colour. The object-of the invention is to enable the colour to be applied to the receiving layerconveniently and expeditiously, and without loss of the 'liquid coloi11',-.or ink, which is the valuable substance in such an operation.

The methodof inking employed in carryingjout', the present invention is of the To all whom it may m2e7%."

21: 9 known-l type in which the ink 'is drawn into itheflreceiving layer j by providing a higher pressure on the supply side than on, the, opposite side of the layerQand thisldiife'rence in pressure may befgobtain ed 'either by the creation of apositive or negativepressure, thatis to say, apre's': sure higher than the atmosphere in the one case, or a suction or negative pressurewhen applied to the said opposite side, inwhich case the higher pressure of the atmosphere on the supply side operates to force the into the'material, f y I i apparatus for impregnating inking pads according v to the present, invention comprises a supporting frame, a reservoir frame, 'and lmeans for clamping the frames one over the other, eachframe having an open centre, the opening of the framesbeing such that a padis givenm-arginal' support thesupportin'g frame, and when the frames are superposed, a; marginal clamping of the pad between, the, frames is obtained. The inkis placed in the open centreof the reservoir frame when a pad has been clamped between the :frames'and the ink is forced the'pad until the latteris impregnated. Preferably, suction is uti.- lized to draw the inkinto the pad,,the ma-Q teri'al'of'which may be felt, for'example, L, Conveniently, the frames maybe hinged together so that there is vertical play atthe hinges, and the clamping pressure; isapplied independently of the hinges towards the front of itheuframes, whereby a level relative displacement between the frames is'ob; ta'inedj V The opening be virtually the nozzle of a suction apparatus, the opening being provided with wires forming asupport for the centre part of the pad, which prevents'the pad being drawn intothe said passage bythe suction;

In place of wires, a, supporting 'gridmay be employed,-or even a perforated areaof the supportin surface. In use, the central opening 'is filed with a measured quantity 0 ink or colour, the suction applied tothe underside, and owing to the pressure of the atmosph the ink is driven into, the e V A'pad suitable for a'stamp pad'may-be composed of two layers of felt, with a sheet of blotting paper between them, and the edges of this pad should be tightly held by the reservoir frame so that "besides affording somelsupportto the pad, they remain clean so thatithelppera'tor can finishthe making-of the pad'in'a cleanly manner The suction should be stop edvb efore the ink isv drawn right th q gh tera r T When completed, and in itsfinal form, it wifl be found that the surface of the pad is 'suitably'inked all over, w

The accompanying drawings illustrate a preferred ,form-of the invention as applied to the filling of the ink containing layer of a stamp 'p'ad and the like: i i

Fig,f1,' is;a plan view of the apparatus, with the reservoir frame open; Fig. 2is' also a plan showing the reservoir frame in the supportingframemfiy closed; Fig; '3 isfa side elevation showing the attachment of the; suction passages, and Fig-,4 is a detail view to an enlarged scale showing inside elevation the construction ofthe hinged joint with vertical play.

Referring to the drawings, 1 is a base plateupon which is provided a surface 2 for: the reception of the material to be inked, say, a pad formed of two layers of felt with apiece of blotting paperbetween them, as shown at 3 in Fig. 3. The opening in the central portion of the surface is provided with cross wires, or bars, such as 4, for supporting the pad over theopening in the surface 2, connected to the suction passage 5 as shown, so that the material is prevented from being drawn into the pipe 5. Guide bars 6, 7 and 8 are placed on three sides of the supporting surface so as to locate the material in correct position, being preferably formed as angle pieces, of which the upstanding flanges enter recesses 9, 10, and 11 respectively of the reservoir frame 12; this frame is hinged by the spindle 13 of the base plate, and is provided with a handle 14 by which it may be raised and lowered on to the material 3. 16, 17 are hand levers pivoted about the pins 18, 19, on the further side of which pins they are provided respectively with the inclined surfaces 20, 21 (see Fig. 3) so arranged that as the handles 16, 17 are turned about their pivots, the inclined surfaces will press down the edges of the frame 12 so as to exert pressure on the compressible felt 3 to such an extent that when in position as shown in Fig. 1, ink or colour may be poured into the recess15 of the frame 12, and upon application of the suction from the passage 5,

this colour will be drawn into the felt 3. In order to assist in the operation of the handles 16, 17, the reservoir frame 12 may be chamferedor bevelled, as indicated at 25', which assures an easy riding of the cams up on to the top of the said frame 12.

The permeation of the ink into the felt may be stopped or continued as may be desired at any point bycontrolling the suction in the passage 5 until th felt is inked to the extent desired, say by a valve 26.

For thesupportof the frame 12 while the felt is being put in place, a bracket 22 is formed so that the frame can be raised against it in its open position.- H

In order that the reservoir frame 12, when clamped to the base plate 1, shall securely clamp the material on all its edges, it is preferred to construct the hinge connection in the following manner. The base plate 1 is provided. with eyes or bearings 23,- and towards each side of the reservoir frame 12 is fixed a similar eye or bearing 24, these bearings being connected to the hinge pin 13, which is carried by the eyes 24. The bearings 23 for the hinge pin 13 are elongated vertically as indicated at 23 (Fig. 4) so that after the frame has been rotated on to the base plate 1, it may be displaced vertically with the eyes 24 and the hinge pin 13 under the action of the cams of the handles 16 and 17.

By the use of this invention any colour may be applied. A change of colour may be quickly provided for, by putting a second frame in the hinge, or a single reservoir frame may be readily cleansed by dipping it in a suitable cleansing liquid; inks of varying density may be applied quickly by varying the degree of suction, and in such case this may be obtained without waste, and with a minimum amount of time and trouble.

Although in the specification it is mentioned that three guides 6, 7 and 8 are used, it will be obvious that two guides, such as 7 and 8, or 6 and 7, would be suitable. It is found in practice that three are preferable.

I claim 1. In apparatus for impregnating inking pads, the combination with an open supporting frame, an open reservoir frame, a hinge connecting the said two frames, allowing a vertical play at the hinge, pivoted cam members on one frame co-acting with a surface on the other frame, whereby the said frames are pressed together independently of the hinge, and means for applying suction to the opening of the supporting frame.

2. In apparatus for impregnating inking pads, the combination with an open supporting frame, an open reservoir frame having recesses therein for the reception of guide members, means for clamping the frames together so that a padportion between them receives marginal support, guide members on the said supporting frame for the purpose of locating the pad to be inked, and means for applying suction to the opening of the supporting frame.

3. In apparatus for impregnating inking pads, the combination with an open supporting frame, an open reservoir frame having recesses therein for the reception of guide members, a hinge connecting the said two frames, allowing a vertical play at the hinge, pivoted cam members on one frame co-acting with a surface on the other frame, whereby the said frames are pressed together independently of the hinge, guide members on the said supporting frame for the purpose of locating the pad to be inked, and means for applying suction to the opening of the supporting frame.

4. In apparatus for impregnating inking pads, the combination with an open supporting frame, a grid covering the opening thereof, an open reservoir frame having recesses therein for the reception of guide members, means for clamping the frames together so that a pad portion between them receives marginal support therefrom and central support from the said grid, guide members on the supporting frame for the purpose of locating the pad to be inked, and means for applying suction to the opening of the supporting frame.

5. In apparatus for impregnating inking pads. the combination with an open supporting frame, a grid covering the opening thereof, an open reservoir frame having recesses therein for the reception of guide members, a hinge connecting the said two frames, allowing a vertical play at the hinge, pivoted cam members on one frame co-acting with a surface on the other frame, whereby the said frames are pressed together independently of the hinge, guide members on the said supporting frame for the purpose of locating the pad to be inked, and means for applying suction to the opening of the supporting frame.

6. In apparatus for impregnating inking pads, the combination with an open supporting frame, a grid covering the opening thereof, an open reservoir frame recesses therein for the reception of guide members, means for clamping the frames together so that a pad portion between them receives marginal support therefrom and central support from the said grid, guide members on the supporting frame for the purpose of locating the pad to be inked a suction mouthpiece shaped at its upper having end to suit the opening of the supporting frame, and at its lower end provided with a union end suitable for connection to a suction pipe, and means for controlling the suction therein.

7. In apparatus for impregnating inking pads, the combination of an open supporting frame, a grid covering the opening thereof, an open reservoir frame having recesses therein for the reception of guide members, a hinge connecting the said two frames, allowing a vertical play at the hinge, a lever with a cam shaped end pivoted on the supporting frame and adapted to ride over the reservoir frame, guide members on the said supporting frame for the purpose of locating the pad to be inked,

means for applying suction to the opening of the supporting frame, and a valve for controlling the suction. v

In-testimony whereof I affix my signature.

WALTER CLARK. 

